US2817639A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing adhesives comprising a phenolic resin and a protein
Assignee: Monsanto Chemicals Ltd
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Filing: 1954-05-12
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Granted: 1957-12-24
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Expires: 1974-05-12
Abstract
No abstract record available.
Inventors
- 👤 Jacob R Ash
- 👤 Alan L Lambuth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:52
CPC Classifications
C; C09; C09J; C09J189/00; C09J161/00; C09J161/04; C09J161/06; C08; C08L; C08L2666/00; C08L2666/02; C08L2666/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
159 words
A PROCESS FOR PREPARING A PLYWOOD ADHESIVE WHICH COMPRISES ADDING FROM 70-120 PARTS OF A WATER-SOLUBLE PROTEIN TO A SUBSTANTIALLY EQUAL WEIGHT OF WATER, MIXING THE PROTEIN AND WATER TOGETHER FOR FROM 3-10 MINUTES TO FORM A SMOOTH LUMP-FREE DISPERSION, IMMEDIATELY THEREAFTER ADDING TO THE DISPERSION FROM 60-90 PARTS OF SODIUM SILICATE AND ABOUT 4 TIMES ITS WEIGHT OF WATER, MIXING THE SODIUM SILICATE AND WATER WITH THE DISPERSION FOR FROM 10 SECONDS TO 10 MINUTES, AND IMMEDIATELY THERE AFTER ADDING 100 PARTS OF A PHENOL-FORMALDEHYDE RESIN IN THE FORM OF A 30-50% SOLIDS AQUEOUS ALKALINE SOLUTION HAVING A PH OF 9-12 AND SUFFICIENT WATER TO MAKE A TOTAL AMOUNT OF WATER FOR THIS ADDITION OF ABOUT 4 TIMES THE DRY WEIGHT OF THE RESIN, AND MIXING TH RESIN WITH THE DISPERSION FOR FROM 1 TO 30 MINUTES, SAID RESIN BEING FUSIBLE, SOLUBLE IN AQUEOUS ALKALI AND SUBSTANTIALLY FREE FROM UNCOMBINED FORMALDEHYDE, SAID PROCESS BEING CARRIED OUT AT 90-100*F.
Claim 2
Dependent Claim
159 words
A PROCESS FOR PREPARING A PLYWOOD ADHESIVE WHICH COMPRISES ADDING FROM 70-120 PARTS OF A WATER-SOLUBLE PROTEIN TO A SUBSTANTIALLY EQUAL WEIGHT OF WATER, MIXING THE PROTEIN AND WATER TOGETHER FOR FROM 3-10 MINUTES TO FORM A SMOOTH LUMP-FREE DISPERSION, IMMEDIATELY THEREAFTER ADDING TO THE DISPERSION FROM 60-90 PARTS OF SODIUM SILICATE AND ABOUT 4 TIMES ITS WEIGHT OF WATER, MIXING THE SODIUM SILICATE AND WATER WITH THE DISPERSION FOR FROM 10 SECONDS TO 10 MINUTES, AND IMMEDIATELY THERE AFTER ADDING 100 PARTS OF A PHENOL-FORMALDEHYDE RESIN IN THE FORM OF A 30-50% SOLIDS AQUEOUS ALKALINE SOLUTION HAVING A PH OF 9-12 AND SUFFICIENT WATER TO MAKE A TOTAL AMOUNT OF WATER FOR THIS ADDITION OF ABOUT 4 TIMES THE DRY WEIGHT OF THE RESIN, AND MIXING TH RESIN WITH THE DISPERSION FOR FROM 1 TO 30 MINUTES, SAID RESIN BEING FUSIBLE, SOLUBLE IN AQUEOUS ALKALI AND SUBSTANTIALLY FREE FROM UNCOMBINED FORMALDEHYDE, SAID PROCESS BEING CARRIED OUT AT 90-100*F.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-23 | 1961-06-24 | 1961-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-23 | 1965-06-24 | 1965-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-23 | 1969-06-24 | 1969-12-24 | $7700.00 | Window Closed / Lapsed |